Home / 20,471.72-28,252.64-11,518.70

Finding the Fourth Proportional to 20,471.72, 28,252.64 and 11,518.70

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Solution

The fourth proportional to 20,471.72, 28,252.64 and 11,518.70 is: 15,896.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.72 : 28,252.64 = 11,518.70 : x
  2. Step 2: Convert to fraction form
    20,471.72/28,252.64 = 11,518.70/x
  3. Step 3: Cross multiply
    20,471.72x = 28,252.64 × 11,518.70
  4. Step 4: Simplify right side
    20,471.72x = 325,433,626.77
  5. Step 5: Solve for x
    x = 325,433,626.77/20,471.72
  6. Step 6: Final answer
    x = 15,896.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.